Nested PDCP PDUs for Relaying Remote Device Data
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Solution Overview
Problem
Current communication systems for remote devices face limitations in supporting a large number of remote devices due to constraints on the number of data radio bearers, which restricts the efficiency of data forwarding and resource utilization.
Innovation Solution
The implementation of nested PDCP PDUs with a specific PDU type field and RD identifier allows for the aggregation of data from multiple remote devices on a single data radio bearer, enabling efficient data forwarding and distinguishing between different remote devices, thereby increasing the number of supported devices and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual data radio bearers are allocated for each remote device, then device communication reliability is improved, but the number of supported devices is limited due to bearer constraints
Solution Approach 1:
The patent combines multiple remote device data streams into a single data radio bearer by implementing a multiplexing mechanism at the PDCP layer. The relay device aggregates data from multiple remote devices and forwards them over one shared bearer, eliminating the need for individual bearers per device while maintaining communication reliability through proper data identification and routing.
Solution Approach 2:
The single data radio bearer is designed to serve multiple remote devices simultaneously, making the bearer multi-functional. The PDCP layer implements universal processing that can handle data from different remote devices through a common interface, with identification mechanisms (such as remote device identifiers in the data structure) enabling proper routing without requiring dedicated bearers.
2Quantity of substance
If multiple data radio bearers are established to support more remote devices, then the number of supported devices increases, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent merges multiple data streams from different remote devices into a single data radio bearer, consolidating resource usage. This approach allows the system to support multiple devices while using only one bearer's worth of radio resources, thereby improving overall resource utilization efficiency and reducing energy consumption compared to establishing separate bearers for each device.
3Loss of energy
If a single data radio bearer is shared among multiple remote devices, then resource utilization efficiency is improved, but device data differentiation becomes difficult
Solution Approach 1:
The patent segments the data stream by incorporating identification information (such as remote device identifiers) within the PDCP layer data structure. This segmentation allows the relay device to distinguish and properly route data from different remote devices even though they share the same physical bearer, preventing information loss and maintaining data differentiation through logical separation.
Data Source
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AI summary
A method for operating a transmitting device includes receiving a first packet data convergence protocol (PDCP) protocol data unit (PDU) associated with a first remote device (RD), the first PDCP PDU including at least a first PDCP header, generating a first nested PDCP PDU in accordance with the first PDCP PDU, the first nested PDCP PDU including a second PDCP header and the first PDCP PDU, the second PDCP header comprising a first PDU type indicator indicating that the first nested PDCP PDU includes a first relayed PDCP PDU and a first identifier associated with the first RD, and sending the first nested PDCP PDU on a radio bearer.